When we were looking for colleges for oldest we stayed in a beautiful historic home in St. Louis.  The owner had a fleur de lis somewhere in each room of his house.  I thought it would be fun to incorporate something similar here to tie all the rooms together.  I started looking more closely at the details of our house and noticed a pattern that seemed to repeat in a lot of places, a trefoil.  I did some research and it was very commonly incorporated into gothic architecture, particularly in building cathedrals. The trefoil of course is a representation of the trinity.  I love that we have so many already here and hope to find a way to incorporate a trefoil of some sort in all 33 rooms!  Some examples: